JPH0651041U - Anti-slip regulation device for 3-axle vehicle - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to provide an anti-slip regulation device for a three-axle vehicle in which the brake is not applied to the rear and rear axle coast wheels even when the ASR brake is activated. [Structure] The front axle is controlled by one booster 4, and the rear two axles are controlled by the same boosters 5, 6 on the left and right, and the rotation sensor 20,
Reference numeral 21 is an anti-slip regulation device for a three-axle vehicle provided only on the front axle and the rear axle, and cut valves 30 and 31 are provided on the brake fluid circuits 32 and 33 on the rear axle.
A control device 22 is provided for closing the cut valve when the ASR control valve 27 is activated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, the front axle is controlled by one booster, the rear two axles are controlled by the same booster on the left and right, and the rotation sensor is provided on the front and rear front axles only. Related to a ration device.

[0002]

[Prior art]

 An anti-lock brake system (ABS) that prevents wheel lock is known because if the wheel is locked during braking, such as when the road surface is slippery or when the driver is braking, the vehicle becomes uncontrollable.

In addition to this device, when one wheel of the drive shaft slips under the influence of road surface conditions, driver's accelerator work, etc., a brake is applied to the slipped wheel to prevent the drive wheel from slipping. Anti-slip regulation devices (ASR) based on the above are known.

When this ASR device is mounted on a rear-front axle driven by two rear axles and the rear-rear axle is mounted on a three-axle vehicle with a coast wheel, the left and right rear axles are left and right for economic reasons, as will be described later. It is generally known to connect each of the two to one air booster and connect the front shaft to one air booster.

In this case, the brake is applied to the slip side, and the engine output is controlled to be reduced when both sides slip.

[0006]

[Problems to be solved by the device]

 However, in the above technology, when the driving wheel on the side where the rear wheel is slipping is braked, the coast wheel on the rear rear axle on the same side is also braked at the same time. It may become impossible to start.

Therefore, an object of the present invention is to provide an anti-slip regulation device for a three-axle vehicle in which the brake is not applied to the rear and rear axle coast wheels even when the brake is applied in the ASR device.

[0008]

[Means for Solving the Problems]

 According to the present invention, the front axle is controlled by one booster, the rear two axles are controlled by the same booster on the left and right, and the rotation sensor is installed on the front axle and the rear front axle only. In the slip regulation device, a cut valve is provided in the brake fluid circuit of the rear and rear axles, and a control device that closes the cut valve when the ASR control valve operates.

[0009]

[Action]

 In the anti-slip regulation device for a three-axle vehicle configured as described above, if the drive wheel on either the left or right rear axle slips, the ASR control device changes the drive wheel on the slipping side (for example, the right side). At the same time as the signal to actuate the brake, a signal to close the cut valve that cuts the brake fluid circuit that cuts off the brake fluid circuit that leads to the coasting wheel on the same side (for example, the right side) is given to stop the braking action of the coasting wheel. No trouble will occur.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, except for the third ASR valve 27, the first and second cut valves 30 and 31, the air circuit connecting them, the electric circuit, and the brake fluid circuit, the same as in the prior art. First, the conventional technique will be described.

A right wheel cylinder 1R of the brake is attached to the right front wheel, and a left wheel cylinder 1L is attached to the left front wheel.

Similarly, for the two rear axles, the right front RF wheel is the right RF wheel cylinder 2R, the rear right wheel is the right RR wheel cylinder 3R, and the left RF wheel is the left RF wheel cylinder. A left wheel sillin 3L is attached to each of the 2L and the left RR wheels.

Each of the wheel cylinders is a brake fluid circuit. The front wheel cylinder is connected to the air booster 4, the left rear wheel is connected to the air booster 5, and the right rear wheel is connected to the air booster 6. .

The air booster 4 is connected to a service tank 12 via an ABS modulator 7 for adjusting the hydraulic pressure of the brake by the air pressure and a relay valve 10 in response to a signal from a control device, and the air booster 5 is connected to the ABS modulator 8. Is connected to the service tank 13 via the double check valve 18 and the relay valve 11.

The air booster 6 is similarly connected to the service tank 13 via the ABS modulator 9, the double check valve 19 and the relay valve 11, and the first ASR valve 25 is provided between the double check valves 18 and 19. , The second ASR valve 26 is connected, and its midpoint is connected to the service tank 13.

The air compressor 16 is connected to the supply tank 14 via the air dryer 15, and from the supply tank, the air compressor 16 is connected to the air compressor 16 via the air pressure governor 17 for controlling the tank pressure and the engine control valve. It is connected to the ASR cylinder 35 via 36.

Further, the brake valve 23 is connected to the relay valves 10 and 11, and the relay valve 23 is connected to the service tanks 12 and 13 by an air circuit.

Further, the rotation sensors 20R, 20L, 21R, 21L, the ABS modulators 7, 8, 9 and the engine control valve 36, the first ASR valve 25 and the second ASR valve 26 are respectively ABS and ABS. It is connected by an electric circuit to the control device 22 for controlling the ASR.

In the anti-lock brake system (ABS), the control device 22 monitors the rotation speed of the wheels from the ABS sensors 20 and 21, and when the brake valve 23 is operated during braking, the control device 22 regulates the brake operation. Judgment of wheel lock tendency by comparing with the deceleration pattern of.

Based on this judgment, the air pressure of the required modulator among the ABS modulators 7, 8, 9 is controlled, and the brake fluid pressure is adjusted via the air boosters 4, 5, 6 to adjust the wheel pressure. It works to prevent locking.

In addition, in the anti-slip regulation device (ASR), the control device 22 shared by the ABS and the AS R constantly monitors the rotation speed of the wheels, and the drive wheels (RF wheels in this example) and non-drive wheels are used. The slip of the driving wheel is judged by comparing the rotation speed with a certain front wheel.

When only one side of the driving wheel slips, the control device 22 sends a signal to the ASR valve 25 or 26 to control the slipping wheel to prevent the slip. When both the left and right sides of the drive wheels slip, the engine output is controlled to prevent excessive slip.

Examples of the present application will be described below.

In FIG. 1, a first cut valve 30 is provided in a brake fluid circuit 32 between a wheel cylinder 3R of an RR wheel, which is a coast wheel, and an air booster 6, and the wheel cylinder 3L and the air booster 5 are connected to each other. A second cut valve 31 is provided in the brake fluid circuit 33 between them, and an air circuit for controlling those valves is connected to an engine control valve 36 via a third ASR valve 27, which ASR valve is a control device. Is connected by an electric circuit.

When the drive wheels are braked to prevent slipping, the control device 22 is configured to close either or both of the cut valves 30 and 31.

Therefore, even if the drive wheels are braked to prevent slippage, the RR wheels, which are coasting wheels, do not lock.

[0028]

[Effect of device]

 Since the present invention is configured as described above, for example, even if the drive wheels are braked by ASR in order to prevent slippage of the drive wheels by transmitting on a slope, the coasting wheels are stopped at the same time so that the vehicle can start smoothly. it can.

Therefore, the ASR can be mounted without any problem even when the rear two axes are driven by one axis.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an overall configuration of an anti-slip regulation device for a triaxial vehicle showing an embodiment of the present invention.

[Explanation of symbols]

 1, 2, 3 ... Wheel cylinders 4, 5, 6 ... Air booster 7, 8, 9 ... ABS modulator 10, 11 ... Relay valve 16 ... Air compressor 18, 19 ... Double check valve 20, 21 ... Rotation sensor 22 ... Control Device 25 ... First ASR valve 26 ... Second ASR valve 27 ... Third ASR valve 30 ... First cut valve 31 ... Second cut valve 31, 32 ... Brake liquid circuit 35 ... ASR cylinder 36 ... Engine control valve

Claims (1)

[Scope of utility model registration request] 1. The front axle is controlled by one booster and the rear two axles.
The left and right shafts are controlled by the same booster, and the rotation sensor is an anti-slip regulation device for three-axle vehicles that is installed only on the front and rear front shafts. An anti-slip regulation device for a three-axle vehicle, which is provided with a control device that closes the cut valve when the control valve operates.